The net work Wnet is the work done by the net force acting on an object. Work done on an object transfers energy to the object. The translational kinetic energy of an object of mass m movin...The net work Wnet is the work done by the net force acting on an object. Work done on an object transfers energy to the object. The translational kinetic energy of an object of mass m moving at speed v is KE=12mv2. The work-energy theorem states that the net work Wnet on a system changes its kinetic energy, Wnet=12mv2−12mv20.